flow through hatchery system

Hatchery Phase Hatcheries used to produce catfish
fry are simple facilities that use
flow-through tanks holding about
90 to 100 gallons of water for egg
incubation and fry rearing. The
most critical factor for a successful hatchery is a dependable supply of
high-quality water. Egg hatching tanks are equipped
with a series of paddles spaced
along the length of the tank to
allow wire-mesh baskets to fit
between them. One or two egg
masses are placed in each basket and the paddles gently rotate
through the water to provide
water circulation and aeration. The
incubation time varies from 5 to 8
days depending upon water
temperature. At hatching, the fry (called sac-fry
at this point) fall or swim through
the wire-mesh basket and school in
tight groups. Sac-fry are siphoned
into a bucket and transferred to a
fry rearing tank. Aeration in fry rearing tanks is provided by
surface agitators or by air bubbled
through airstones. Initially, sac-fry are not fed
because they derive nourishment
from the attached yolk sac. Over a
3- to 5-day period after hatching
they absorb the yolk sac and turn
black. At that time fry (now called swim-up fry) swim to the water
surface seeking food. Swim-up fry
must be fed 6 to 12 times a day for
good survival and growth. Fry are
fed nutritionally complete feed for
2 to 7 days before they are transferred to a nursery pond. For your flow through hatchery and fish pond set up, call us on 08032861326.

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